let message1: string = "hello world";
let message2: string = "Hello World";

const name = "pengfan";
const age = 21;
const height = 1.88;

// 个人习惯：默认情况下，如果可以推导出对应的标识符的类型时，一边情况下不加类型注解
let message3 = `name: ${name} age: ${age} height: ${height}`;


console.log(message3);
export {};
